Copper no longer a dirty word for gold miners

For gold miners, copper used to be a four-letter word. “Pure” gold stocks traded at a premium to diversified miners and, for the most part still do. And, even if they did pull other metals from the ground, the companies considered them as by-products, credits to be used to offset the cost of getting an ounce of the good stuff out of the ground.
But, gold mining has changed. For the most part, mines are deeper these days, grades are lower, costs are higher and new ounces are harder to come by………………………………………..Full Article: Source